Focal 15K 8711

15" · 8 Ω · 225 W · 93.3 dB · datasheet ↗

Thiele-Small parameters

Nominal size	15"
Impedance	8 Ω
Fs	23.9 Hz
Qts	0.362
Qes	0.42
Qms	2.6
Vas	321.3 L
Sd	855.3 cm²
Xmax	6 mm
Re	6.2 Ω
Bl	17.7 T·m
Mms	141.5 g
Pe	225 W
Sensitivity	93.3 dB

Alignment hint

EBP	57 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 114.1 L

EBP 50-100: works in either a sealed or ported alignment.

Rules of thumb from T/S parameters only. Verify against a real simulation before cutting wood.

Substitute candidates

Driver	Fs (Hz)	Qts	Vas (L)	Xmax (mm)	Sens (dB)	Fit	Notes	Compare
Focal 15WX	24.4 +0.5	0.353 -0.01	318.9 -2.4	6 =	93.5 +0.2	close		+
Focal AUDIOM 15WX	24.4 +0.5	0.353 -0.01	318.9 -2.4	6 =	93.5 +0.2	close		+
SB Acoustics SB42FHC75-6	22.5 -1.4	0.372 +0.01	318 -3.3	10.1 +4.1	94 +0.7	close		+
TVM ARA 390-00/8 v2	25 +1.1	0.399 +0.04	320 -1.3	5.5 -0.5	93.2 -0.1	close	150 W vs 225 W: lower power handling · Xmax 5.5 mm < 6 mm: lower excursion-limited SPL	+
Visaton TIW400	23 -0.9	0.348 -0.01	300 -21.3	10.6 +4.6	93.3 =	close		+
Focal AUDIOM 15KX	25.8 +1.9	0.384 +0.02	280.3 -41	6 =	93.8 +0.5	close		+
Monacor SPH-390TC vp	24 +0.1	0.325 -0.04	297 -24.3	6.2 +0.2	96.2 +2.9	close	4 Ω vs 8 Ω: amp load changes · 150 W vs 225 W: lower power handling	+
ATC PA100-375 STD	26 +2.1	0.377 +0.02	358 +36.7	5.6 -0.4	95.1 +1.8	close	100 W vs 225 W: lower power handling · Xmax 5.6 mm < 6 mm: lower excursion-limited SPL	+
JBL GT 152	24 +0.1	0.393 +0.03	319 -2.3	7.6 +1.6	97.9 +4.6	close	4 Ω vs 8 Ω: amp load changes	+
Adire Audio TEMPEST DVC 4 Ohms config	18.8 -5.1	0.377 +0.02	317 -4.3	8.2 +2.2	92.8 -0.5	close	4 Ω vs 8 Ω: amp load changes	+

Compare the closest 3 against the 15K 8711 →

Ranked on parameter similarity only (Qts, Fs, Vas, Xmax, sensitivity). Same nominal size required. A hint, not a simulation, model the swap before cutting or buying.

Used in enclosures (0)

No enclosure in the catalog uses this driver yet.